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Individual
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Individual
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Priority claimed from US06/158,709external-prioritypatent/US4381938A/en
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Publication of DE3152111A1publicationCriticalpatent/DE3152111A1/en
DE198131521111980-06-121981-06-08
IMPROVED MULTI-PURPOSE ZONE CONTROLLED BLAST FURNACE AND METHOD OF PRODUCING HOT METAL, GASES AND SLAGS
WithdrawnDE3152111A1
(en)